Orifice Data Fields (InfoWorks)
An orifice plate controls the discharge from a storage tank or pond. It consists of a plate with a hole, usually circular, for the flow to pass through.
Orifice data can be edited on either the Orifice Grid Window of the Links Grid or the Orifice Property Sheet.
To view and edit all orifice data, use the Property Sheet.
This table describes all the orifice specific data which can be used to define an orifice. For details of results fields, see the Link Results Data Fields topic.
Common Data Fields Fields that are common to the majority of objects can be found in the Common Fields topic.
Orifice Data
Database Table Name: hw_orifice
|
Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
|||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Invert level |
The level at which the orifice comes into operation. There is no default value for this field, the valid range is -99.9 to 999.9
|
invert |
Double |
|
Z |
3 |
|
-9999 |
9999 |
|
6000 |
|||||||||||||||||||||
|
Diameter |
Diameter of circular orifice. You should use the diameter of equivalent area for non-circular orifices. There is no default for this field; the valid range is 0 to 999.9 |
diameter |
Double |
|
L |
3 |
|
0.0 |
|
0.01 |
|
|||||||||||||||||||||
|
Discharge coefficient |
This is the coefficient for the orifice flow equations. The discharge theory for an orifice predicts a typical velocity and concentration coefficient to be 1.0, which is the default value. The valid range is 0.01 to 999.9. Values typically range between 0.2 and 3.0 |
discharge_coeff |
Double |
|
|
2 |
1 |
0.01 |
|
|
|
|||||||||||||||||||||
|
Secondary discharge coefficient |
This applies when the depth of water is less than the diameter of the orifice, and weir equations apply. The default is the primary discharge coefficient. |
secondary_discharge_coeff |
Double |
|
|
2 |
|
0.01 |
|
|
|
|||||||||||||||||||||
|
Limiting discharge |
The maximum discharge from upstream to downstream allowed through the orifice. The valid range is 0 to 999.9. If the value is greater than zero, this will be the maximum positive flow allowed through the orifice. For variable discharge orifice controls (Vldorf) this value is used for the initial limiting discharge. The default value is zero. A value of zero, or a blank field, means no restriction on maximum discharge for an Orific type of orifice. For a Vldorf type of orifice, a limit of zero is imposed when the Limiting discharge is set to 0. |
limiting_discharge |
Double |
|
Q |
3 |
|
0 |
|
|
|
|||||||||||||||||||||
|
Minimum flow |
The minimum limiting discharge for the orifice. |
minimum_flow |
Double |
|
Q |
3 |
0 |
0 |
|
|
|
|||||||||||||||||||||
|
Maximum flow |
The maximum limiting discharge for the orifice. |
maximum_flow |
Double |
|
Q |
3 |
999 |
0 |
|
|
|
|||||||||||||||||||||
|
Positive change in flow |
The rate at which the limiting discharge for the orifice increases. The value must be greater than zero. This applies to RTC controlled orifice discharge rates. Flow data from TVD connectors will be applied directly to the orifice. |
positive_change_in_flow |
Double |
|
DQ |
5 |
|
0.000001 |
|
|
|
|||||||||||||||||||||
|
Negative change in flow |
The rate at which the limiting discharge for the orifice decreases. The value must be greater than zero. This applies to RTC controlled orifice discharge rates. Flow data from TVD connectors will be applied directly to the orifice. |
negative_change_in_flow |
Double |
|
DQ |
5 |
|
0.000001 |
|
|
|
|||||||||||||||||||||
|
Threshold |
The minimum change in limiting discharge that the software will implement. Any smaller change will be ignored. This prevents oscillation. |
threshold |
Double |
|
Q |
3 |
0 |
0 |
|
|
|
|||||||||||||||||||||
|
US node ID |
Type in a node reference or choose an existing node reference from the drop down list. This makes up the first part of the link reference. |
us_node_id |
Text |
64 |
|
0 |
|
|
|
|
|
|||||||||||||||||||||
|
Link suffix |
A single character between A and Z or 0 and 9 which completes the link reference. This allows a node to have up to 36 downstream links. The suffix is automatically allocated by the software. |
link_suffix |
Text |
1 |
|
0 |
1 |
|
|
|
|
|||||||||||||||||||||
|
DS node ID |
Type in a node reference, or choose an existing node reference from the dropdown list. |
ds_node_id |
Text |
64 |
|
0 |
|
|
|
|
|
|||||||||||||||||||||
|
Link type |
The sub-type for this orifice. Select from the dropdown list.
|
link_type |
Text |
6 |
|
0 |
ORIFIC |
|
|
|
|
|||||||||||||||||||||
|
System type |
Choose the system type from the dropdown list. See System Type for more information.
|
system_type |
Text |
10 |
|
0 |
Other |
|
|
|
|
|||||||||||||||||||||
|
Asset ID |
For reference only. Designed as a reference to an asset database, but could be used for anything. |
asset_id |
Text |
64 |
|
0 |
|
|
|
|
|
|||||||||||||||||||||
|
Sewer reference |
An optional reference to identify the sewer of which this conduit is a part. |
sewer_reference |
Text |
80 |
|
0 |
|
|
|
|
|
|||||||||||||||||||||
|
Points |
This field defines the geometry of the link. The underlying data consists of a series of (x,y) pairs defining the vertices of the link. Each link is made up of a series of straight lines between the defined (x,y) points. This data is not displayed on the grid or property sheet.  Link Vertice Export
Link vertices are included when you export link data to CSV files. There are two options available for exporting link vertices. These are selected on the Select CSV Export Options Dialog using the Coordinate Arrays Format dropdown list. The options are:
|
point_array |
Array |
|
XY |
0 |
|
|
|
|
|
|||||||||||||||||||||
|
DS settlement efficiency (%) |
See US Settlement Efficiency. |
ds_settlement_eff |
Long Integer |
|
|
0 |
0 |
0 |
100 |
|
|
|||||||||||||||||||||
|
US settlement efficiency (%) |
The settlement efficiency fields allow you to set the effectiveness of an overflow for trapping out sediment. The overflow is a link (normally a pipe) attached to a node acting as a storage tank (storage node or manhole). Normally the upstream end of the link will be attached to the node and act as the overflow. The upstream settlement efficiency determines the efficiency for the overflow. In some circumstances the link may be reversed (storage tank at the downstream end) and the downstream settlement efficiency will be used. In many cases an overflow will attach to an outfall from the system. It would be very unusual to have both upstream settlement efficiency and downstream settlement efficiency set to non-zero values. The valid range is 0-100%. 0% means the overflow acts as a normal continuation link. 100% means that the overflow traps out as much sediment as possible. |
us_settlement_eff |
Long Integer |
|
|
0 |
0 |
0 |
100 |
|
|
|||||||||||||||||||||
|
Branch ID |
Numeric field used to identify to which long section the link is associated. Can be set manually or automatically (see Defining Branches topic for more information). |
branch_id |
Long Integer |
|
|
0 |
|
0 |
|
|
|
|||||||||||||||||||||
|
InfoAsset unique ID |
Unique ID associated with the corresponding object in an InfoAsset Manager database. When importing from InfoAsset Manager, the InfoAsset ID can be copied from the InfoAsset database in order to maintain links between the two networks. |
asset_uid |
GUID |
|
|
0 |
|
0 |
0 |
0 |
0 |
|||||||||||||||||||||
| InfoAsset ID |
Used to store the ID of the corresponding InfoAsset object when Importing from a Collection Network. |
infonet_id | Text | 40 | 0 |
Water Quality
